JP3750564B2 - Coaxial cable end - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a terminal portion of a round conductor multi-core cable in which a plurality of insulated cables formed by covering a round conductor with an insulator are arranged in parallel, and in particular, for a liquid crystal display of a personal computer or an ultrasonic diagnostic apparatus. The present invention relates to a terminal portion of a round conductor multi-core cable that can be directly connected to a connector for an FPC (Flexible Printed Circuit Board) used around a display.
[0002]
[Prior art]
An electronic device such as an LCD (Liquid Crystal Display) used in a notebook personal computer or the like is equipped with an FPC connector for connecting the electronic device and a cable. The FPC connector is provided with a concave insertion groove into which the FPC is inserted, a plurality of contacts provided along the insertion groove and electrically connecting the LCD and the FPC inserted into the insertion groove of the connector. Yes.
[0003]
Note that the FPC connector is disclosed in Japanese Patent Laid-Open No. 2000-100505, Japanese Patent Laid-Open No. 7-106028, Japanese Utility Model Laid-Open No. 5-73855, and the like.
[0004]
In addition to the FPC, there are FFCs (Flexible Flat Cables) in which a plurality of flat conductors are matched with the contact pitch of the FPC connector and laminated with an adhesive film (polyester, polyimide, etc.). In the case of FFC as well as FPC, FFC is inserted into the FPC connector to enable electrical connection.
[0005]
A two-layer FPC composed of a signal layer and a GND layer is also inserted into an FPC connector with GND to enable electrical connection.
[0006]
In recent years, along with the downsizing and thinning of notebook PCs and portable PCs, the above-mentioned FFCs with flat conductors have limited wiring space and 360 ° bendability, and there are multiple ultra-fine cables and ultra-fine cables with round conductors. Coaxial cables are becoming used.
[0007]
[Problems to be solved by the invention]
However, when a cable having a round conductor is used, a crimp connector, a pressure contact connector, a solder connector, etc. must be used, so when an FPC connector is already attached to an electronic device such as an LCD, There is a problem that it is impossible to use a cable having a round conductor without changing the FPC connector to another connector.
[0008]
Also, when using the FPC connector as it is and using a cable with a round conductor, it is necessary to manufacture a relay FPC, etc., solder it to the relay FPC, and use it. There is a problem that the initial cost of FPC production is increased and the cost is increased.
[0009]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a round conductor multi-core cable that can be directly inserted and connected to the FPC connector without changing the FPC connector already mounted on the electronic device side, and that has excellent wiring and flexibility. To provide a terminal unit.
[0010]
The present invention has been devised to achieve the above object, and the invention of claim 1 covers an inner conductor made of a round conductor with an inner insulator, and an outer conductor is provided on the outer periphery of the inner insulator. At the end of a coaxial cable in which a plurality of coaxial cables configured by covering the outer conductor with an outer insulator are arranged in parallel, the outer conductor is exposed by removing the outer insulator at both ends of each coaxial cable. by removing the tip of the outer conductor to expose the inner insulator, the exposed inner insulator tip to expose the inner conductor is removed to the inner conductor exposed deformed into flat conductive, of the coaxial cable A reinforcing plate with an adhesive in which only a substantially L-shaped ground conductive layer is formed on the lower surface in advance , and one side of the substantially L-shaped ground conductive layer is the same as the pitch of the flat conductor Laminate to pitch Together, wherein the other side of the substantially L-shaped ground conductive layer of the flat type conductor and electrically insulated state, that will be a plurality of parallel arranged with connection outer conductor and the solder of each of the coaxial cable It is the terminal part of the coaxial cable.
[0011]
The invention of claim 2 is characterized in that a film with an adhesive is affixed to the lower surface of the flat conductor and fixed, and a reinforcing plate with an adhesive is provided on the lower surface of the film with an adhesive to reinforce. It is the terminal part of the coaxial cable.
[0012]
According to a third aspect of the present invention, the arrangement pitches of the coaxial cables are arranged in parallel so as to be 0.5 mm, the width of the flat conductor is 0.3 mm ± 0.03, and the thickness of the flat conductor is 0.00. The terminal portion of the coaxial cable according to claim 1, wherein the end portion is 3 mm ± 0.05 .
[0013]
The invention of claim 4 is the terminal portion of the coaxial cable characterized in that a plurality of coaxial cables arranged in parallel are fixed by sandwiching the central portion from above and below with an adhesive tape .
[0014]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings.
[0015]
FIG. 4 shows a terminal portion of a round conductor multi-core cable which is a reference example of the present invention, FIG. 4 (a) is a plan view, FIG. 4 (b) is a sectional view taken along the line GG, FIG. ) Is a cross-sectional view taken along line HH, and FIG. 4D is a side view.
[0016]
As shown in FIGS. 4A to 4D, the terminal portion 1 of the round conductor multi-core cable according to the present invention is an FPC connector that is mounted in advance on an electronic device such as an LCD used in a notebook computer or the like. It is inserted and connected. In the terminal portion 1 of this round conductor multi-core cable, for example, a round single wire conductor is used as the round conductor.
[0017]
The terminal portion 1 of the round conductor multi-core cable has a plurality of insulated cables 4a, 4b... Formed by covering the round single wire conductors 2a, 2b. Insulators at both ends of each of the fixed insulated cables 4a, 4b,... arranged in parallel with p, and the center parts of the insulated cables 4a, 4b,. The round conductors 2a, 2b ... are exposed by removing 3a, 3b ..., and the exposed round single wire conductors 2a, 2b ... are transformed into flat single wire conductors 6a, 6b ..., respectively. FIG. 4 shows an example in which 11 insulated cables are arranged in parallel.
[0018]
A flat single wire conductor 6a, 6b ... and an adhesive layer having an adhesive layer formed on the upper surface thereof on the lower surfaces of both ends of the insulators 3a, 3b ... covering the unexposed round single wire conductors 2a, 2b ... The film 7 with an agent is affixed. When the exposed round single wire conductors 2a, 2b ... are transformed into the flat single wire conductors 6a, 6b ..., there is a deviation from the initial arrangement pitch p, but the exposed round single wire conductors 2a, 2b ... are replaced with the flat single wire conductors. The flat single wire conductors 6a, 6b,... Are rearranged so as to have the initial arrangement pitch p, and the adhesive-attached films 7, 7 are attached to the flat single wire conductors. 6a, 6b... Can be fixed at the initial arrangement pitch p.
[0019]
On the lower surfaces of the films 7 and 7 with adhesive, reinforcing plates 8 and 8 with adhesive having an adhesive layer formed on the upper surface are provided to reinforce the terminal portion 1 of the round conductor multi-core cable. The thickness of the reinforcing plate with adhesive 8 is made thicker than the thickness of the film 7 with adhesive to ensure the strength of the terminal portion. The area of the reinforcing plate with adhesive 8 is the same as the area of the film 7 with adhesive.
[0020]
The thickness Ds of the end portion 1 of the round conductor multi-core cable, that is, the thickness from the bottom surface of the adhesive reinforcing plate 8 to the top surface of the flat single wire conductors 6a, 6b,. The flat single wire conductors 6a, 6b,... And the connector contacts can be electrically connected to each other so that they can be inserted into the concave insertion grooves.
[0021]
A feature of the present invention is that only a portion inserted into an existing FPC connector of a cable having a round conductor (including a coaxial cable, as will be described later) is deformed from a round conductor to a flat conductor, so that FPC or FFC is obtained. In other words, the flat conductors are aligned and fixed at a predetermined pitch using a film with an adhesive and a reinforcing plate, and the thickness is adjusted to an existing FPC connector specified value.
[0022]
Next, the manufacturing procedure of the terminal portion 1 of the round conductor multi-core cable will be described in more detail with reference to FIGS.
[0023]
FIG. 1 is a plan view (a) showing a step of exposing a round single wire conductor at a terminal portion of a round conductor multi-core cable, a sectional view taken along line AA (b), and a sectional view taken along line BB (c). It is. FIG. 2 is a plan view (a) showing a step of deforming an exposed round single wire conductor flat single wire conductor at an end portion of a round conductor multi-core cable, its CC line sectional view (b), D- It is D line sectional drawing (c). FIG. 3 is a plan view (a) showing a process of attaching a film with an adhesive to a flat single wire conductor at a terminal portion of a round conductor multi-core cable, a cross-sectional view taken along line E-E (b), and a line F-F. It is sectional drawing (c) and a side view (d).
[0024]
As shown in FIGS. 1A to 1C, first, 11 insulated cables 4a, 4b,... Are arranged in parallel so that the arrangement pitch p is 0.5 mm, and the adhesive tapes 5, 5 are arranged from above and below. Are fixed together, and the insulated cables 4a, 4b... Are fixed. The obtained tape-shaped round conductor multi-core cable is cut so that the length L becomes 200 mm. MIN. From each end of each insulated cable 4a, 4b. The insulators 3a, 3b... Are removed by 4 mm or more to expose the round single wire conductors 2a, 2b.
[0025]
Next, as shown in FIGS. 2 (a) to 2 (c), the exposed round single wire conductors 2a, 2b,... Are aligned on a lower mold having grooves cut at a pitch of 0.5 mm, and from above. Each of the round single wire conductors 2a, 2b,... Is pressed with an upper die, and deformed into flat single wire conductors 6a, 6b,... Having a width d of 0.3 mm ± 0.03.
[0026]
3A to 3D, the flat single wire conductors 6a, 6b,... Are rearranged so that the arrangement pitch p is 0.5 mm, and the flat single wire conductors 6a, 6b,. And adhesive films 7 and 7 having an adhesive layer formed on the upper surface are attached to the lower surfaces of both ends of the insulators 3a, 3b... Covering the unexposed round single wire conductors 2a, 2b. And fix.
[0027]
Further, as shown in FIGS. 4 (a) to 4 (d), when the adhesive reinforcing plates 8 and 8 having an adhesive layer formed on the upper surface are attached to the lower surfaces of the adhesive films 7 and 7 for reinforcement. The end portion 1 of the round conductor multi-core cable is completed. The thickness D of the terminal portion 1 of the round conductor multicore cable is set to 0.3 mm ± 0.05.
[0028]
As described above, the terminal portion 1 of the round conductor multi-core cable according to the present invention deforms only the portion inserted into the FPC connector already mounted on the electronic device side from the round conductor to the flat conductor, The same structure as FPC and FFC, that is, the flat conductors are aligned and fixed at a predetermined pitch using a film with adhesive and a reinforcing plate with adhesive, and the thickness is adjusted to the existing FPC connector specified value. Without changing the FPC connector, it can be directly inserted and connected to an existing FPC connector.
[0029]
Moreover, since the portion that is not inserted into the FPC connector, that is, the conductor portion covered with the insulator is a round conductor, it has excellent wiring and bendability compared to a flat conductor. In addition, bundled wiring is also possible.
[0030]
Next, a second embodiment will be described.
[0031]
FIG. 5 is a plan view (a) of a terminal portion of a round conductor multi-core cable which is a reference example of the present invention, a sectional view taken along line II (b), a sectional view taken along line JJ (c), and a side view. (D).
[0032]
As shown in FIG. 5, the end portion 50 of the round conductor multi-core cable removes the insulation cables 4a, 4b, ..., the insulators 4a, 4b ... at both ends to expose the round single wire conductors 2a, 2b ... The films 7 and 7 with adhesive are fixed to the lower surfaces of the exposed round single wire conductors 4a, 4b, and are reinforced by providing the reinforcing plates 8 and 8 with adhesive on the lower surfaces of the films 7 and 7 with adhesive. It is a thing.
[0033]
The terminal portion 50 of the round conductor multi-core cable cannot be directly inserted and connected to an existing FPC connector. However, if the contact shape of the FPC connector is changed, the round conductor can be used as it is. The terminal portion 50 of this round conductor multi-core cable has an advantage that it is more excellent in wiring / flexibility than the terminal portion 50 of the round conductor multi-core cable described in FIG.
[0034]
In the above embodiment, an example in which a round single wire conductor is used as the round conductor has been described. However, the round conductor may be a pre-soldered stranded wire, a high wrap conductor, or the like. The present invention can be directly inserted and connected to the FPC connector, but can also be applied to soldering not to the FPC connector but to an FPC or a printed circuit board.
[0035]
Next, a third embodiment will be described.
[0036]
FIG. 6 is a plan view of the terminal portion of the coaxial cable according to the preferred embodiment of the present invention.
[0037]
As shown in FIG. 6, the terminal part 60 of the coaxial cable according to the present invention is for connection with an FPC connector with GND that is mounted in advance on an electronic device such as an LCD. Each of the coaxial cables 61a, 61b ... covers the inner conductors 62a, 62b ... as round conductors with the inner insulators 63a, 63b ..., and the outer conductors 64a, 64b ... are arranged on the outer periphery of the inner insulators 63a, 63b ... The external conductors 64a, 64b,... Are respectively covered with the external insulators 65a, 65b,.
[0038]
The terminal portion 60 of the coaxial cable has a plurality of coaxial cables 61a, 61b,... Arranged in parallel, and external insulators 65a, 65b,... And internal insulators 63a, 63b,. The outer conductors 64a, 64b ... and the inner conductors 62a, 62b ... are exposed, and the exposed inner conductors 62a, 62b ... are transformed into flat conductors 66a, 66b ....
[0039]
On the lower surface of the exposed outer conductors 64a, 64b,... And the inner conductors 62a, 62b, etc., there is provided a reinforcing plate 68 with an adhesive having a conductive layer 67 as a ground wiring pattern and an adhesive layer formed on the upper surface. The terminal portion 60 of the coaxial cable is reinforced. The conductive layer 67 on the upper surface of the reinforcing plate with adhesive 68 is formed to have the same pitch as the flat conductors 66a, 66b. The external conductors 64a, 64b... And the conductive layer 67 of the reinforcing plate with adhesive 68 are connected by soldering.
[0040]
As described above, in the end portion 60 of the coaxial cable according to the present invention, only the portion to be inserted into the FPC connector with GND is deformed from the round conductor to the flat conductor, and the flat conductor using the adhesive reinforcing plate is used. Are aligned and fixed at a predetermined pitch, and the thickness is adjusted to the specified value for the existing FPC connector with GND, so that the existing FPC connector with GND can be directly inserted and connected to the existing FPC connector with GND. it can.
[0041]
As a result, the present invention can be applied to a coaxial cable with little high-frequency loss and easy terminal processing, and can cope with the high image quality of the LCD.
[0042]
When a coaxial cable is used, for example, an adhesive layer for aligning and fixing the flat conductors at a predetermined pitch is formed on one surface of the reinforcing plate with adhesive, and the ground surface is formed on the other surface. A conductive layer as a wiring pattern may be formed, and the outer conductor of the coaxial cable and the conductive layer may be connected by soldering or the like. Also in this case, connection with an existing FPC connector with GND is possible.
[0043]
【The invention's effect】
As is apparent from the above description, the present invention exhibits the following excellent effects.
[0044]
In the end portion of the coaxial cable according to the present invention, the inner conductor exposed from the inner insulator is transformed into a flat conductor, so that the existing FPC connector can be directly inserted and connected without changing the existing FPC connector. it can.
[0045]
(2) The present invention can also be applied to a coaxial cable, and can cope with high image quality of an LCD.
[Brief description of the drawings]
FIG. 1 is a plan view (a) showing a step in a reference example of the present invention, a sectional view taken along line AA (b), and a sectional view taken along line BB (c).
2A is a plan view showing the next process of the terminal portion of the round conductor multi-core cable shown in FIG. 1, FIG. 2B is a sectional view taken along line CC, and FIG. 2C is a sectional view taken along line DD. It is.
3A is a plan view showing the next step of the terminal portion of the round conductor multi-core cable shown in FIG. 2, FIG. 3B is a sectional view taken along line EE, and FIG. 3C is a sectional view taken along line FF. It is a side view (d).
FIG. 4 is a plan view (a), a GG sectional view (b), an HH sectional view (c), and a side view (d) in a reference example of the present invention (shown in FIG. 3). The next process of the end portion of the round conductor multi-core cable is shown).
5A is a plan view of a terminal portion of a round conductor multi-core cable according to a second embodiment of a reference example of the present invention, FIG. 5B is a cross-sectional view taken along the line II, and FIG. It is a figure (c) and a side view (d).
FIG. 6 is a plan view of a terminal portion of a coaxial cable which is a preferred embodiment of the present invention.
[Explanation of symbols]
1 End of round conductor multi-core cable 2a, 2b ... Round single conductor (round conductor)
3a, 3b ... Insulator 4a, 4b ... Insulated cable 6a, 6b ... Flat single wire conductor (flat conductor)

Claims (5)

A coaxial cable in which a plurality of coaxial cables are arranged in parallel by covering an inner conductor made of a round conductor with an inner insulator, providing an outer conductor on the outer periphery of the inner insulator, and covering the outer conductor with an outer insulator. In the end portion of each coaxial cable, the external insulators at both ends of each coaxial cable are removed to expose the external conductor, the exposed external conductor tip is removed to expose the internal insulator, and the exposed internal insulator tip parts to expose the inner conductor is removed to the inner conductor exposed deformed into flat conductive, the lower surface of the coaxial cable, only pre-ground Yoshirube conductive layer of substantially L-shaped in its upper surface is formed adhered The reinforcing plate with agent is bonded so that one side of the substantially L-shaped ground conductive layer has the same pitch as the flat conductor, and the other side of the substantially L-shaped ground conductive layer is The flat conductor and electric To an insulating state, the terminal portion of the coaxial cable, characterized in that that will be a plurality of parallel arranged with connection outer conductor and the solder of each of the coaxial cable.   The coaxial cable end portion according to claim 1, wherein a film with an adhesive is affixed and fixed to the lower surface of the flat conductor, and a reinforcing plate with an adhesive is provided on the lower surface of the adhesive film to reinforce.   The coaxial cables are arranged in parallel so that the arrangement pitch is 0.5 mm, the width of the flat conductor is 0.3 mm ± 0.03, and the thickness of the flat conductor is 0.3 mm ± 0.05. The terminal part of the coaxial cable according to claim 1 or 2.   4. A coaxial cable terminal portion according to claim 1, wherein a central portion of the coaxial cables arranged in parallel is sandwiched and fixed with adhesive tape from above and below.   The end portion of the coaxial cable according to claim 4, wherein the reinforcing plate with adhesive is not in contact with the adhesive tape.

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